23856138 has 24 divisors (see below), whose sum is σ = 51823200. Its totient is φ = 7931304.

The previous prime is 23856113. The next prime is 23856167. The reversal of 23856138 is 83165832.

23856138 is a `hidden beast` number, since 2 + 38 + 5 + 613 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6393 + ... + 9411.

It is an arithmetic number, because the mean of its divisors is an integer number (2159300).

Almost surely, 2^23856138 is an apocalyptic number.

23856138 is an abundant number, since it is smaller than the sum of its proper divisors (27967062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23856138 is a wasteful number, since it uses less digits than its factorization.

23856138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466 (or 3463 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 23856138 is about 4884.2745623071. The cubic root of 23856138 is about 287.8724116561.

The spelling of 23856138 in words is "twenty-three million, eight hundred fifty-six thousand, one hundred thirty-eight".